Multiple-switch starter.



' the starting resistance.

UNITED STATES PATENT OFFICE.

MULTIPLE-SWITCH STARTER.

To all w71 om it ma y concern.'

Be it known that l, HENRY J. WIEGAND, n i citizen of the United States,residinv ot Milwaukee. in the county of Milwau tee und Stute oflVisc-onsin, have invented new and useful Improvements in MultipleSwitch Stortcls, of which the following is n full, clear. concise, undexact description, reference being hud to the accompanying drawi ing,forming a pil-rt of this specification.

.'ily invent-ion relates to improvements in l motor controllers. I'

It is particularly applicable to controllers g in which a plurality ofhand operated j; switches are used for controlling n resistance.

Unc of thc objects of my invention is to Ii provide ny menus whereby themotor circuit l' will be opened unless a-ll of the switches are closed,and all of the resistance is removed from circuit.

According to the preferred form of my invention, l provide n pluralityof hand opernted switches preferably adopted to .be closed in n definitesequence for controlling These switches are retained in their closedposition by a. low voltage device, and one.of the switches is adopted tocontrol the motor circuit. In order that the operator may not leave partof thc storting resistance in circuit. I provide n. switch forcontrolling the operating circuit of said low voltage device, which hasa tondency to move to a. position to render said low voltage deviceinoperative, and which, duringr t e closing operation of the switchesmust be held by the operator in n position to render said low volta-gedevice operativo. For retaining t-his switch in n. position to maintainthe low voltage device operative after all of the switches are closed, Iprovide o latch which is operated upon the closix 0 of the last switchto mechanically hold thelow voltage device switch in a position torender said low voltage device o erative.

While I illustrate andp describe the preferred embodiment of myinvention, which I have worked out for practical application, it

` be understood that m invention is Specification o! Letters Patent.Application Bled Hay 20, 1907, Serial No. 374.728.

susceptible to various mo ications and changes. i

For the purpose of disclosing my invention, I have illustrated in theaccom an drawings, one form which my invention may 'thereof to directlyconnect take.

lotented March 2, 1909. Renewed January 11, 1909. Serial No. 471.775.

In said drawings: Figure 1 is n l'ront. eleva.- tion of the startingdevice of m invention, Fig. 2 is a sido elevation thercol, Fig. 3 is ndetailed view of tho hitch mechanism for holding the switch in a. closedposition, Fig. 4 is a. sectional t-op view of one of the switches, anda. top view ot' the cooperating rocking do Fig. 5 is a detailed vicw ol'one of tho roc ting dogs, and Fig. 6 is o diagramnmtic view of thecircuit connections.

in the embodiment of my invention illustinted, l provide n plurality ot'switch levers or arms 1, l, 1b, und 1, which nre suilnhly pivoted orJouriudcd at onccnd, and provided i at the opposite cud with suitable oicrntinf handles. l have shown the severo swit-ci levers as journolcd unn n shiu't or rod :2, which is mourned in bearings 3, formed onbrackets 4. The brackets 4 also support o rod which is threaded throughn rubber tube 6 that serves ns n cushion or butler against which theextended ends o1l the switch or levers nrc adopted toimpinge when thrownopen. Euch ot the levers carries n cont-uct device adopted to engagecontact surfaces to complete the circuit therethrough. Upon the baseboard S, upon which are mounted, the various operating ports of thedevice nd which may bo formed of shite. soopstone or like material. ismounted a contact bnr 9 with which one end of the o0ntact device 7 ofeuch arm or lever is odapted to engage, thcI other end ot' Suid devicebeing adapted to engage one of the contact terminals 10, 10, l()b and10, also mounted upon the hase 8. The terminal 10 is provided with nbinding post. 1l, hy which suitable electrical connections may be modeond the terminal 10 is provided with a hindi post- 12. Upon the terminal10 is mountg carbon block 13 and n similnr block 14 is mounted upon theend of the Contact bar 9. The switch arm 1 carries laterally extendingSE1-ing arms 15 and 16, which support upon te ends thereof, carbonblocks 17 zuid 1S rennd which nre adopted when the switch arm l ismoved, to close the circuit. to engage the blocks 13 and 14, whereby thecircuit is closed from the terminal 10 to the termina-l 9. The furthermovement of the switch arm 1 causes the contact device 7 the terminals10 switch arm 1 is device 7 leaves speot-ively,

and 9. Likewise when the moved outward, the contact the terminals l()and ti before the carbon hlm-.ks sepas-atte so that :my ure formed h vthe opening ot' the circuit will trike pince hetween the carbon blocks,instead ot' lwtweeu mctnllic surfaces.

Nour the upper end oi' the switch nrm is formed u lug 1t which isprovided with n hiterally extending rod 2U which may take the form of oscrew. Mounted upon the base board b', nbove the nrin 1 is a retaining,lmognet 121 having an armature 22 pivoted at 23. The armature carries alaterally and upwardly extending lug 24, und when the urin 1 is moved toclose the circuit, the rod or projection 20 engages the side of thearmature 22, to move the same against the nmgnet pole, and the magnetismof the magnet 1 retains the armature 22 in this position. The swingingof the armature 2:2 carries the lug 24 upon the exterior' ot' thepro'ection 20, so that the projection will rest 1n t e slot. formedbetween the lug und the armar-ure, und as long as the magnet 21 remainsenergized, the uvm will thus be held in n. closed position. when,however, the magnet 21 is denergized the armature 21 will be releasedond the weight of the arm 1 will carry thc same. into position, shown inFig. 2.

Mounted upon :t rod or shaft 2.5, supported in suitable bearings upont-he has@ plete e', :ire rocking dogs 2li, 26, and 26". Euch or' thedoos has its reml end so shaped us to engage the base plate 8, and linutthe downwurd movement of the dog when free. Upon the end of the dog, tothe righthand side, an upwardly extending lip 27 is formed which hasAits front edge curved and its rear edge perpendicular to the up )ersurface of the dog. The underside of t e dog has a lip 2S, extendingthroughout its entire length, which is rounded ofi' at the leftn hundedge. The levers 1" to 1 are escl; provided with u. latch 29, pivoted tothe erm at, 30, and set in aslot 31, formed in the arm, the walls ofwhich slot limit the vertical movementof the hitch relatively to theBelow the latch and formed integrally with the lever is a lug 32Llprojecting outward toward the base plate an consisting of two ports 33rind 24.

he part 33 is s nare in section and flat upon the end, and w en thelever is in a position to close the circuit presents s, vertical sur.-face. The upper part of the pert- 34 is inelined or chnmfered ot annent-e angle.

Mount-ed in the bearings 35, formed in the brackets 4, is :1 rod orshaft 36, which at one end carries e. downwardly and laternllvprojecting ann 37, and at its opposite end immeF diately beneath thelever 1c carries a1 cross erm 38. One end of the arm is provided with aroller 39 adapted to be pressed into engagement with the projecting endof the lever 1c, by a coiled spring 40 interposed between the oppositeend of the erm and e stud or projection 41 extending from the base 8.

.\t` the lower left hond end of the hose S, n .sn-'itch nrni 4t2 ispivotully mounted und is held in its open or normul position h y n.coiled lspring' til, minimi-d upon thu pivot stud olL tho switch. Thisswitch is ndaipted to mirko contri-et with the contact stud 44, nud whenmoved into engagement wit-h tho contact -H will he held in thut positionhy the nrm 37, engaging.: over n pin or projection 4:3 on the arm 42,when the nrm .37 is moved inwn rdly by the closing ofthe switch 1". Whenthe switch 1c is thrown closed, the extension thereotI moves the endcarrying the roller 3) of the arm outxvnrdly, thereby rotating the shaltand throwing the :irm 37 inn'nrdly in n position to engnge the pin 45nnd hold the switch against the tension ofthe spring43 'lhe circuitconnections for my invention es applied to n stnrtirr,f rheostzit formotors nre illust-rated iu Fig. 6. Referring to this figure thecontrari; terminal 1U is cininerted r. ith the positive side lo of thesupplj- 11min, 11nd the terminal 1U is connected hy the conductor 4?,through the armature 4b' ol" the motor, ith the negative side 49 ol' thesupply rnnin. 'lhe suite-h :trio 42 is connected by n conductor 5() withthe nega-tivo side Ain of the supply mein, enti the contact 44 of saidswitch connected hy conductor 5l, through the resistance 52, with oneterminal of the magnet 21. 'l'he opposite terminal of the magnet isconnected by :L conductor 52 r. ith one terminal of the field winding'53 of the motor, the opposite teminal of which is connected to thenega.- tive side 49 of the supply main. A branch conduct-or 54 alsoconnects one terminal of the nnding 21 with the contact bar Q. A sectionol resistance 55 extends between the contact har 9 and the contactterminal IU and a second resistance 56 is connected ontdoen Liteterminals i2 tutti imui is divided into sections and connected also withthe terminal l0".

The operation of the device above described is es follows: Assuming thatit bc desired to start the motor, the operator with one hand moves theswitch 42 until it. eng eyes the contact 44. With his other hand theoperator closes the lirst switch 1. Circuit is then established from thepositive side 46 to contact 10, across the snit-ch l, by conductor 54,through the windimgr 21, through the resistance 52, by conductor 5lacross the switch 42, and by conductor 5U, to the negative side of thesupply main. This energizes the magnet. 21, end n hen the armature 22 ofthe mngnct is moved int-o engagement with the pole piece thereof, it isheld in that position, therebv holding the arm 1 closed. 'The closing,rof the Snitch 1 also closes the circuit from the positive side to themntnct terminal 10. thence across the arm 1, to the contract terminal 9,through'the resistnnces 55 und 56, to Contact temlinnl l, thence hyconductor 47, through the armature 4S of the motor, und brick to thenegative side 4'.) of thc liuc. Circuit is also established from thccontact'. t), by conductors 54 und 52", through the shunt icld winding53. The motor is thus started with all thc armature resisto-nce incircuit. ln moving the arm l to thc closed position, t'zo oblique wall34 of the lug.;r 32 thereof engages under the face of thc first rockingdog 26, and moves the seme to the iosition indicatedin full lines inFig. 3. 'l` io second switch erm 1" is now closed, and as the dog* 26 isin its raised position, the latch 29 of the a-rm 1 will ride over thelip 27 of the dog 26, and engage the vertical wall thereof, holding theswltc arm l in o closed position. The closin of thc switch l cut-s outone section 55 o the armature resist-ance. As the second arm 1Il isclosed, the inclined n'n-ll 34 of thc lug 32 of this arm will engageunder t-he face of the second rocking dogr 26, and raise this dog intoits en raging position, where the lip 27 thereof wi l be engaged by thelatch 29 of the arm 1*. Thcnrms may be thus successively ciosed'untilall of the starting resistance is removed from circuit. During theclosing operation, the switch 42 must he hold closed by the operatoragainst the tendency of the spring 43. in order that thc circuit throughthe magnet- 21 will he maintained closed.. As the last Snitch 1* isclosed, the arm 37 is moved inwardly until the end thereof lies in thepath of the pin 45 and prevents the arm vfrom moving under the iniuenceof thc spring 43 to an open position. The magnet 2l-is thus maintainedoperative until it is desired to open the circuit and sto the motor oruntil the current in the line fe ls below a predetermined point. If itis desired to cut in the resistance and open the circuit through themotor, the retaining magnet 2l is denergized in any desired manner, andthe arm 1 will be rcleased and ily outward. In moving outwerd, the arm 1permits the Bist rocking'dog 26 to fell and the latch of the switch l'is released. The movingr of the second Vsnit-ch arm to its open positionreleases the latch 26*l 4and dpermits the third `switch 4ui'm`v to open,an in a similar manner each svz'iizchv crm releases-thenertSmcQedngiarnl until all of theswitch arms AlurvcL-heen released.

y attempt Ito "closeone .of switch I `l armsV out of its rcgulerorder`prevente'` ed, due to the fact thctzthegzitfece 331vill'j` v eliges@thevenidfof-the d'ewhnfn .lower Pitimfand it `isolrwlmi 0s 'f has beenraised .to then'pw `thev lct face 3312s lthel endfoitlie'roc crm hasboon closed. tentlonul closing of one of th(l switch arms out of itsregular order is thus prevented.

switches, ofV retain of said switches in c sed positionI `manuallyoperated means independent of sind switches for rendering said retainingmeans operative until a. certain switch is closed, and means operated bysaid switch lfor holding said manu switches, of vretaining means for ofsaid switches closed, means independent 'of said switches which must beheld during thev closing operation lng. said retaining 1 means o 1svitches'ff 's magnet for `h'o said switches' ineiclosedposition,manually o ratedawhch `xnlistbe held l sufren The occidental or inl'tmuy lmp n that the operator after closing some o the switch arms undhcforo he closes the lust arm is called away from the storting device orthrough ignorance or carclessness leaves the starting device withouthaving closed the lust switch arm. As soon, however, iis he releases thcswitch 42 the switch under the influence of the will fly open, therebyopening the circuit through t mitting all of the arms to open und o nthe circuit through the motor. fore be seen that it is impossible for acareless or ignorant opera-tor to leave a portion of the startingresistance in circuit. The Insistance of n storting device is usuallyconstructed of wire which, while sutlicientla)r heavy to carry thecurrent for a short period of time while the motor is being started, isnot usually of suflicient capacity to carry current for a considerableperiod of time. As the operator can not leave the starting devicewithout having closed the last switch, if he remains and holds the handswitch 42 closed and does not close all of the switches, he willimmediately be notiiied of the fact by the heating of the resistance.seen that it is impossible for the operator to leave the resistance ofthe starting device in circuit for any great eriod of time spring 43 icretaining magnet 21, and por- It wi there- It is therefore Having thusdescri ed my nventlon what I claim as new and desire to secure byLetters Patent is:

1. The combination with e pluralitylof means for holding all allyoperated means. 2. The combination with c.` Alllurelity of olding allvmeans operative, and emitednpbn manually` A for fender# 1 115 g. v thecloslng of the last switch orV -holdmgsaid mimuellyheld d.efssingzopscmfor@dering-ssd 'maghe c1 operittionV for rendering said mal'not operative, and means operated upon t io closinv of the last switchfor holding said manually opera-ted switch.

5 5. The combination with a pluralitwof i switches, of a retaming magnetfor holdin said switches closed, a switch manually heli during theclosing operation for rendering said magnet operative, and automaticallyheh after the closing operation is4 com leted.

6. The combination with a purality of switches, of a retaining ma netfor holding said switches closed, a switc i which must be manually heldin operative position during the closing operation, and means operatedby the last switch for holding said manually operated switch.

7. The combination with a plurality of switches, of a retaining m metfor holding :u said switches closed, a switc which must be manuell heldduring the closing operation for ren er v said magnet operative, and alatch for ho dingI said switch when the last switch of the sequence isclosed.

5 8. The combination with a plurality of switches, of a retaining magnetfor hohling said switches ciosed, a switch which must be manually helddurin the closing operation, and a latch operate by the last switch for3o holding said manual switch.

9. 1n a motor controller the combination with a resistance, of aplurality of switches for controlling said resist-ance, a switch among'said switches for controlling the motor a5 circuit,` a low voltagedevice coperating with said last mentioned switch whereby the same isoperated to o en the motor circuit in event the voltage alls below apredetermined point, a switch operatively connect-ed with sind lowvoltage device having a tcnd- ,w ency to move to a position to causesaid low voltage device to cause the circuit to be opened and adapted tobe held by tho operator orainst moving to said position during the ousing operation of the switches, and a latch operated upon the closingof the lest switch of the series for holding said switch in a positionto render said low voltage device operatlve.

10. In a motor controller the combination with a resistance, of aplurality of switches for controlling said resistancez a switch amongsaid switches for controlling the mo tor circuit, a low voltage devicecooperating with said last mentioned switch whereby the same is operatedto open the motor circuit in event the voltage falls below apredetermined point, a switch operatively connected with said lowvoltage device having a tendency to move to a position to cause said lowG0 voltage device to cause the circuit to be opened and adapted to beheld by the operator during the closing of the hrst mentioned switchesagainst lnovinv to said posil tion and a latch operated 'oy last switchg5 for holding said low voltage device switch l against moving to aposition to cause said low voltage device to cause the circuit'to be lopened.

In witness whereof, I have hereunto subi scribed my name in the presenceof two Wit nesses.

HENRY J. WIEGAND. Witnesses:

T. E. Bumm, R. H. hhnsmnm), Jr.

